EP1652658B1 - Procédé et dispositif pour fabriquer bande par bande une couche de protection ou autre couche de renforcement d'un pneu - Google Patents

Procédé et dispositif pour fabriquer bande par bande une couche de protection ou autre couche de renforcement d'un pneu Download PDF

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Publication number
EP1652658B1
EP1652658B1 EP05109966A EP05109966A EP1652658B1 EP 1652658 B1 EP1652658 B1 EP 1652658B1 EP 05109966 A EP05109966 A EP 05109966A EP 05109966 A EP05109966 A EP 05109966A EP 1652658 B1 EP1652658 B1 EP 1652658B1
Authority
EP
European Patent Office
Prior art keywords
strip
tire
strips
breaker
carcass
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
EP05109966A
Other languages
German (de)
English (en)
Other versions
EP1652658A1 (fr
Inventor
Albert James Yovichin
Andres Ignacio Delgado
Mary Beth Dombrosky
Mark Anthony Sieverding
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Goodyear Tire and Rubber Co
Original Assignee
Goodyear Tire and Rubber Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Goodyear Tire and Rubber Co filed Critical Goodyear Tire and Rubber Co
Publication of EP1652658A1 publication Critical patent/EP1652658A1/fr
Application granted granted Critical
Publication of EP1652658B1 publication Critical patent/EP1652658B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
    • B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/08—Building tyres
    • B29D30/10—Building tyres on round cores, i.e. the shape of the core is approximately identical with the shape of the completed tyre
    • B29D30/16—Applying the layers; Guiding or stretching the layers during application
    • B29D30/1657—Applying the layers; Guiding or stretching the layers during application by feeding cut-to-length pieces in a direction inclined with respect to the core axis and placing the pieces side-by-side to form an annular element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/70—Annular breakers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/08—Building tyres
    • B29D30/10—Building tyres on round cores, i.e. the shape of the core is approximately identical with the shape of the completed tyre
    • B29D30/16—Applying the layers; Guiding or stretching the layers during application
    • B29D2030/1664—Details, accessories or auxiliary operations not provided for in the other subgroups of B29D30/00
    • B29D2030/1692—Changing the orientation of the layers, e.g. plies, to be applied
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T152/00—Resilient tires and wheels
    • Y10T152/10—Tires, resilient
    • Y10T152/10495—Pneumatic tire or inner tube
    • Y10T152/10765—Characterized by belt or breaker structure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T152/00—Resilient tires and wheels
    • Y10T152/10—Tires, resilient
    • Y10T152/10495—Pneumatic tire or inner tube
    • Y10T152/10765—Characterized by belt or breaker structure
    • Y10T152/10783—Reinforcing plies made up from wound narrow ribbons

Definitions

  • the invention relates generally to a tire breaker structural component manufacturing method and, more specifically, to a breaker strip manufacturing method and an apparatus in a flexible tire manufacturing system.
  • a vehicle tire typically comprises a radial carcass, tread, and tread reinforcing breaker or belt disposed between the carcass and tread.
  • the breaker component pursuant to conventional techniques is constructed across the tread region as either a single sheet component applied unitarily or a series of overlapping strips extending in the peripheral direction of the tire.
  • the width of the overlap between adjacent strips may be selected across the width of the tire to alter the characteristics of the breaker or to adjust the overlapping breaker strips so that the cumulative width of the strips covers the width of the target breaker region beneath the tread. Variations in the width of the tire may require strips of differing widths or the overlapping of such strips to a greater or lesser extent.
  • US-B- 5,213,642 is representative of such an approach.
  • the technique of constructing a breaker onto a carcass by the overlapping application of breaker strips one at a time carries significant disadvantages.
  • the overlapping portions of adjacent breaker strips represents increased and often unnecessary material waste, adding to the cost of manufacture.
  • the breaker layer comprise a single layer applied as non-overlapped strips in order to enhance uniformity and the consistency of tire construction across the tire radial width.
  • strips such as those proposed in US-B-5,213,642 edge to edge across the tread region rather than an overlapping construct causes a new set of difficulties and can result in material waste as well.
  • a typical passenger tire may require 20 to 60 strips.
  • strips of a precise and prescribed width could be utilized to exactly cover the target region in an edge to edge non-overlapping layer in order to leave no remainder gap. While theoretically possible, such an approach would necessitate expensive production and inventorying of strips of varying widths in order to accommodate tires of varying sizes. Not only would the cost of inventory and production equipment escalate, but the change-over time required to transition strips of one width out and strips of a second width in for tires of varying sizes would undesirably complicate the manufacturing process and add cost to the each tire.
  • the invention relates to a method for applying a tire breaker or another reinforcement layer according to claim 1 and to an apparatus according to claim 7.
  • each strip is applied to the outside of the carcass at a predesignated angle to the axial centerline of the tire.
  • An applicator head may translate to produce the desired path or the carcass may be rotated as the applicator attaches each strip, or a combination of the two may be employed.
  • the end gap is precalculated based upon the nominal width of the strips and the size of the carcass (tire) onto which the strips are to be positioned. The end gap is distributed between each strip in the process of applying the strips to the carcass, whereby imparting a uniform strip pattern around the tire with a uniform distributed gap between adjacent strips.
  • strips of a common size may be employed in the construction of tires of differing sizes by calculating the respective end gap expected for each tire size based upon the width of the strips; calculating a distributed gap width required to distribute the end gap evenly between each strip in the process of applying the strips to the carcass; and applying the strips to the carcass at a separation spacing substantially equivalent to the calculated distributed gap value.
  • the end gap is eliminated and distributed evenly to a series of distributed gaps of an acceptable width.
  • Axial and “axially” means lines or directions that are parallel to the axis of rotation of the tire.
  • Belt structure means at least two annular layers or plies of parallel cords, woven or unwoven, underlying the tread, unanchored to the bead, and having both left and right cord angles with respect to the equitorial plane of the tire.
  • Carcass means the tire structure apart from the belt structure, tread, undertread, and sidewall rubber over the plies, but including the beads.
  • “Circumferential” means lines or directions extending along the perimeter of the surface of the annular tread perpendicular to the axial direction.
  • Equitorial plane means the plane perpendicular to the tire's axis of rotation and passing through the center of its tread.
  • Ring and radially means directions radially toward or away from the axis of rotation of the tire.
  • FIG. 6 an exemplary radial-ply tire 10 is shown in FIG. 6 for illustration.
  • the tire 10 is provided with a ground-engaging tread portion 12, which terminates in the shoulder portions 14 at the lateral edges of the tread.
  • Axially outer sidewall portions 16 extend from shoulder portions 12 and terminate in the bead portion 18, the bead portion having an annular inextensible tensile member or bead core 20.
  • the tire 10 is further provided with a carcass reinforcing structure 22 which extends from the tensile members 20 through the sidewall portions 16, the tread portions 14.
  • the turnup ends 24 of the carcass reinforcing structure 22 are wrapped about the tensile members 20.
  • the bead portion 18 has a toeguard wrapped about the carcass reinforcing structure 22 and the tensile member 20.
  • the tire 10 may include a conventional innerliner 26 forming the inner peripheral surface of the tire 10 if the tire is to be of the tubeless type.
  • the breaker structure 28 may comprise first and second breaker plies 30, 32 as represented in FIG. 5, each formed as single cut belt plies and the cords of the belt plies are oriented at an angle ranging between 20° and 60° with respect to the equitorial plane of the tire.
  • the cords of neighboring plies 30, 32 are disposed in opposite directions with respect to the equitorial plane EP of the tire.
  • the breaker structure 28 may comprise any number of belt plies of any desired configuration and the cords may be disposed at any desired angle.
  • each strip is formed having reinforcement cords 36 extending longitudinally and each strip is constructed to provide a stepped overlap joint 38 along opposite edges 40.
  • the strips 34 are dispensed onto a rotating drum 42 by means of an applicator head 44 that moves reciprocally across the outer drum surface as the drum rotates in a synchronous manner. As each strip is applied to the drum, it is positioned by head 44 edge to edge with an adjacent strip, the strip joints 38 overlapping to form the entirety of the breaker structure 28.
  • the angle of the breaker structure 28 relative to the rotating drum 42 may be varied to design specifications pursuant to conventional practice.
  • the reinforcement breaker structure 28, pursuant to the invention, is constructed from a plurality of strips 34 composed of reinforcement cords formed from any known materials known in the art for breaker reinforcement cords. Such materials include but are not limited to steel, aramid, or nylon.
  • the strips 34 as best seen in FIGS. 4 and 5 are intended to be of a generally standardized width suitable for layering a breaker structure to tires of varying sizes. The strips are laid side by side to form a layer of spaced strips.
  • Each strip 34 may, but not necessarily, be configured to provide a plurality of cords 36 extending longitudinally and the strips 34 may be configured in a layer that may be, although not necessarily, angled to the equitorial plane of the tire as shown in FIG. 4.
  • the strips may be assembled to a drum as shown in FIG. 1 or be assembled directly to a carcass layer during tire formation.
  • FIG. 3 illustrates a breaker reinforcement apparatus including an applicator arm 46 that moves pivotally as indicated by arrow 48 relative to a rotating tire carcass 50.
  • the apparatus depicted in FIGS. 3 and 5 is intended to be schematic and representative of but one method of laying on a breaker reinforcement constructed pursuant to the invention. Other means for laying on such a breaker construction are intended to be within the scope of the invention.
  • the carcass 50 receives the breaker reinforcement directly in the method shown in FIGS. 3 and 5. It will be apparent to those skilled in the art that the breaker package may be affixed to a drum if desired and subsequently applied to a carcass if preferred.
  • the apparatus arm 48 further includes a head 54 that is supplied with breaker reinforcement material.
  • the breaker material is applied or fed and cut from head 54 onto rotating carcass in a programmed manner so as to lay down strips 34 as shown.
  • the arm 48 includes a pivot joint 60 at the base end and a pivot joint 58 proximate the head 54 to facilitate movement of the head 54 across carcass 50.
  • strips 34 are applied at a prescribed angle relative to the equitorial plane of tire carcass 50 as is known in the art.
  • the apparatus 52 serves to support and rotate tire carcass 50 synchronously with the application of strips 34 in a semi-liquid form by means of the apparatus head 54.
  • the subject invention permits the use of strips 34 of standardized width for the creation of a tire breaker for tires of varying sizes.
  • the strip of breaker is applied onto the tire carcass, one narrow strip at a time at a predesignated angle.
  • the applicator head may translate to produce the desired path or the drum rotated and the applicator head attaches the strip, or a combination of the two may be employed.
  • a preapplication calculation of a residual end gap is made based upon the breaker strip width and the circumferential area to be covered. The residual end gap encountered by the last strip is then reduced to a distributed gap width 62 as shown in FIGS. 4 and 5.
  • the distributed gap width 62 is the gap distributed between each strip 34 so that the breaker coverage is uniform and of a uniform pattern around the tire.
  • the distributed gap 62 is preferably substantially uniform between each strip 34 but the gap 62 may vary slightly between each strip so long as the distributed gap width is not large enough to compromise the performance of the breaker to an unacceptable degree.
  • the end gap is recalculated for the new tire size and the distributed gap width based upon the calculated end gap is determined.
  • the distributed gap width may differ from tire size to tire size a nominal amount without detrimentally affecting breaker performance to an unacceptable level. Applying the breaker as a strip rather than a sheet onto the tire carcass, gives much flexibility in tires of different sizes, belt angles, etc. Change over time from one setup to another is reduced and allows belts to be produced to order versus requiring individual component rolls for each width, angle, tire size, and gage. As a result, equipment costs are reduced and equipment footprints smaller, thus reducing floor space costs and reducing manpower that otherwise be required to man a separate component making station.
  • Breaker strips could be produced at the tire building equipment (or fabricated remotely if desired). Preferably, each strip would have a predesigned ends-per-inch (EPI). Tires of differing sizes would require more or less strips to encompass the whole tire. For example, a typical passenger tire may require 20 to 60 strips. If 20.6 strips or 60.3 strips would be necessary to cover the entire tire, an applier would be required to reduce the width of the last strip to completely encompass the outside of the carcass and have zero clearance between strips. This would mean cutting a 21 st or a 61 st strip to fill the final gap. The result would produce an unacceptable level of scrap and be cost prohibitive. In using the subject invention, the end gap that the last partial strip would fill is distributed between each strip.
  • EPI ends-per-inch
  • the maximum distributed gap is less than one end count preferably, well within acceptable limits. With the subject invention, therefore, for the 20.6 strips case, only 20 strips would be used and the 15.24 mm (0.6 inch) strip would be distributed between the 20 strips, giving a 0.762 mm (0.03 inch) gap between strips which, for a 24 EPI code, is equivalent to a 0.72 cord gap. For the 60.3 strips example, one would distribute the 7.62 mm (0.3 inch) strip among the 60 strips, resulting in a 0.127 mm (0.005 inch) gap between strips which, for a 24 EPI code, is equivalent to a 0.01 cord gap. For lower end counts, the distributed gap would be even less.
  • the method applying a breaker or other reinforcement layer to a carcass strip by strip therefore, comprises the steps of calculating an end gap based upon a nominal strip width, the size of the carcass, and the end count desired; calculating a distributed gap required to distribute the calculated end gap substantially equally between each strip; and applying the breaker strip by strip with each strip being separated from an adjacent strip by the distributed gap spacing.
  • a tire formed by the process described thus would be fabricated in a cost effective and efficient manner without compromising the acceptable performance criteria of the breaker ply.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tyre Moulding (AREA)
  • Tires In General (AREA)

Claims (10)

  1. Procédé pour appliquer une bande de sommet (28) ou une autre couche de renforcement bande par bande, le procédé comprenant les étapes consistant à :
    a) calculer un espace libre terminal en se basant sur une largeur de bande nominale, sur la dimension de la carcasse, et sur le nombre final que l'on souhaite obtenir ;
    b) calculer un espace libre distribué (62) requis pour distribuer l'espace libre final calculé essentiellement de manière égale entre chaque bande (34) ;
    c) appliquer la nappe de sommet (28) ou l'autre couche de renforcement bande par bande, chaque bande étant séparée d'une bande adjacente par l'écartement d'espace libre distribué (62).
  2. Procédé selon la revendication 1, dans lequel les bandes (34) sont appliquées sur une carcasse de bandage pneumatique.
  3. Procédé selon la revendication 2, dans lequel les bandes sont appliquées en formant un angle par rapport à un plan équatorial de la carcasse du bandage pneumatique.
  4. Procédé selon la revendication 1, dans lequel les bandes (34) sont appliquées sur un tambour (42).
  5. Procédé selon la revendication 4, dans lequel les bandes (34) sont appliquées en formant un angle par rapport à un plan équatorial du tambour (42).
  6. Procédé selon au moins une des revendications précédentes, comprenant en outre l'étape consistant à utiliser les bandes (34) dans l'application d'une nappe de sommet de bandage pneumatique (28) d'un bandage pneumatique de dimensions différentes, l'étape en question consistant à :
    d) recalculer un espace libre final en se basant sur une largeur de bande nominale, sur la dimension de la carcasse et sur le nombre final que l'on souhaite obtenir pour le bandage pneumatique de dimension différente ;
    e) recalculer un espace libre distribué requis pour distribuer l'espace libre final calculé essentiellement de manière égale entre chaque bande pour le bandage pneumatique de dimension différente ; et
    f) appliquer la nappe de sommet bande par bande, chaque bande étant séparée d'une bande adjacente par l'écartement d'espace libre distribué qui a été recalculé.
  7. Appareil pour la construction d'une nappe de sommet (28) ou d'une autre couche de renforcement dans un bandage pneumatique bande par bande, l'appareil comprenant :
    a) un moyen pour calculer un espace libre final en se basant sur une largeur de bande nominale, sur la dimension de la carcasse, et sur le nombre final que l'on souhaite obtenir ;
    b) un moyen pour calculer un espace libre distribué requis pour distribuer l'espace libre final calculé essentiellement de manière égale entre chaque bande ; et
    c) un moyen pour appliquer la nappe de sommet bande par bande, chaque bande étant séparée d'une bande adjacente par l'écartement d'espace libre distribué.
  8. Appareil selon la revendication 7, dans lequel les bandes (34) sont appliquées sur une carcasse de bandage pneumatique.
  9. Appareil selon la revendication 7, dans lequel les bandes (34) sont appliquées en formant un angle par rapport à un plan équatorial (EP) de la carcasse du bandage pneumatique.
  10. Utilisation du procédé selon au moins une des revendications 1-6, lors de la confection d'un bandage pneumatique.
EP05109966A 2004-11-01 2005-10-25 Procédé et dispositif pour fabriquer bande par bande une couche de protection ou autre couche de renforcement d'un pneu Expired - Fee Related EP1652658B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/978,508 US7344614B2 (en) 2004-11-01 2004-11-01 Tire breaker strip application method and tire fabricated therefrom

Publications (2)

Publication Number Publication Date
EP1652658A1 EP1652658A1 (fr) 2006-05-03
EP1652658B1 true EP1652658B1 (fr) 2008-01-16

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EP05109966A Expired - Fee Related EP1652658B1 (fr) 2004-11-01 2005-10-25 Procédé et dispositif pour fabriquer bande par bande une couche de protection ou autre couche de renforcement d'un pneu

Country Status (7)

Country Link
US (1) US7344614B2 (fr)
EP (1) EP1652658B1 (fr)
JP (1) JP4690860B2 (fr)
CN (1) CN100519159C (fr)
BR (1) BRPI0504335A (fr)
DE (1) DE602005004351T2 (fr)
ES (1) ES2299964T3 (fr)

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JP2015212109A (ja) * 2014-05-01 2015-11-26 住友ゴム工業株式会社 空気入りタイヤ
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JP4607420B2 (ja) 2002-11-25 2011-01-05 株式会社ブリヂストン タイヤの製造方法
JP4133301B2 (ja) 2002-12-25 2008-08-13 株式会社ブリヂストン タイヤ構成部材の製造方法
JP4238040B2 (ja) 2003-01-22 2009-03-11 株式会社ブリヂストン タイヤ補強層の形成装置

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US20060090831A1 (en) 2006-05-04
JP2006130920A (ja) 2006-05-25
CN100519159C (zh) 2009-07-29
JP4690860B2 (ja) 2011-06-01
CN1769038A (zh) 2006-05-10
ES2299964T3 (es) 2008-06-01
DE602005004351T2 (de) 2009-01-15
BRPI0504335A (pt) 2006-06-27
US7344614B2 (en) 2008-03-18
EP1652658A1 (fr) 2006-05-03
DE602005004351D1 (de) 2008-03-06

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